"Today marks a major milestone in the development of the Go programming language. We're announcing Go version 1, or Go 1 for short, which defines a language and a set of core libraries to provide a stable foundation for creating reliable products, projects, and publications. Go 1 is the first release of Go that is available in supported binary distributions. They are available for Linux, FreeBSD, Mac OS X and, we are thrilled to announce, Windows."

While I really like Go and see myself doing serious programming with it in the not too far off future I have to agree with top poster that it is currently quite slow from my tests and also tests I've seen on Language Shootout. Still, like you said it's a very young language and I'm guessing the focus sofar has been on squashing bugs and pinning down the exact language properties.

Also I've only tried the official 64-bit compiler (6g), I hear the GccGo compiler creates much more optimized code (due to it hooking into GCC's much more mature optimizing backend) so that's an option and also it proves that there's alot more performance to be crammed out of the official compilers given time.